Geometry: add the copyLocation() method

lib/src/main/java/com/github/stephengold/vsport/Geometry.java

@@ -34,6 +34,7 @@ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 import org.joml.Matrix3fc;
 import org.joml.Matrix4f;
 import org.joml.Quaternionf;
+import org.joml.Vector3f;
 import org.joml.Vector3fc;
 
 /**
@@ -88,6 +89,18 @@ protected Geometry() {
     // *************************************************************************
     // new methods exposed
 
+    /**
+     * Return a copy of the location of the mesh origin.
+     *
+     * @param storeResult storage for the result (modified if not null)
+     * @return a location vector in world coordinates (either
+     * {@code storeResult} or a new vector null)
+     */
+    public Vector3f copyLocation(Vector3f storeResult) {
+        Vector3f result = uniformValues.copyLocation(storeResult);
+        return result;
+    }
+
     /**
      * Return a copy of the mesh-to-world coordinate rotation.
      *

lib/src/main/java/com/github/stephengold/vsport/NonGlobalUniformValues.java

@@ -76,6 +76,21 @@ class NonGlobalUniformValues {
     // *************************************************************************
     // new methods exposed
 
+    /**
+     * Return a copy of the location of the mesh origin.
+     *
+     * @param storeResult storage for the result (modified if not null)
+     * @return a location vector in world coordinates (either
+     * {@code storeResult} or a new vector, not null)
+     */
+    Vector3f copyLocation(Vector3f storeResult) {
+        if (storeResult == null) {
+            return new Vector3f(location);
+        } else {
+            return storeResult.set(location);
+        }
+    }
+
     /**
      * Return a copy of the mesh-to-world coordinate rotation.
      *